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sweet-ann [11.9K]
3 years ago
11

Skyscrapers,railroads, and suspensions bridges were made possible by the

Social Studies
2 answers:
Usimov [2.4K]3 years ago
7 0
The invention of steel, which was lighter and stronger than iron. Thanks for your question! Don't forget to rate and give me the brainliest answer! Then, I can help you with all your problems! ^-^ ~

Harman [31]3 years ago
6 0
They were made possible by the invention of steel
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